- Dec 4, 2015
- United States
It is +5 when your knee is almost flat. -5 is when it is hyperextended and the foot comes off of the floor with your knee flat.the knee flat (don’t know what it’s called) is at 5 or -5? almost all the way down, but not quite...PT said no worries
A good way to check extension yourself is like this:
1. put your leg on a bench, seat, bed, floor or anything similar but preferably something fairly firm.
2. with not too much pressure, press the back of your knee down - use your leg muscles, not your hand!
3. slide your hand, palm down, under the back of your knee
a) if you can get your entire hand under easily, it's probably about +10 degrees
b) if you can get just your fingers under, it's about +5
c) if you can get your fingers under but it's a push, it's +0
d) if you can't get your fingers under at all, it's -5 or more
Here's a graphic to explain the degrees involved
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